[1] Univ Ulsan, Asan Med Ctr, Dept Allergy & Clin Immunol, Coll Med, Seoul, South Korea
[2] Vet Hlth Serv Med Ctr, Dept Internal Med, Seoul, South Korea
[3] Seoul Natl Univ, Dept Internal Med, Coll Med, Seoul, South Korea
[4] Kyungpook Natl Univ, Chilgok Hosp, Sch Med, Dept Allergy & Clin Immunol, Daegu, South Korea
[5] Imperial Coll London, Natl Heart & Lung Inst, London, England
[6] Royal Brompton & Harefield NHS Trust, London, England
[7] Queens Univ Belfast, Ctr Expt Med, Sch Med Dent & Biomed Sci, Belfast, Antrim, North Ireland
[8] Kyungpook Natl Univ, Coll Nursing, Res Inst Nursing Sci, Daegu, South Korea